Safe Delete: Skip usages inside of overriding to-be-deleted declarations

#KT-7253 Fixed

idea/testData/refactoring/safeDelete/deleteFunction/kotlinFunctionWithJava/usageInOverrideToDelete.java

@@ -0,0 +1,8 @@
+class J implements T {
+    T u;
+
+    @Override
+    public void foo() {
+        u.foo();
+    }
+}

idea/testData/refactoring/safeDelete/deleteFunction/kotlinFunctionWithJava/usageInOverrideToDelete.java.after

@@ -0,0 +1,4 @@
+class J implements T {
+    T u;
+
+}

idea/testData/refactoring/safeDelete/deleteFunction/kotlinFunctionWithJava/usageInOverrideToDelete.kt

@@ -0,0 +1,9 @@
+interface T {
+    fun <caret>foo()
+}
+
+class A(val t: T) : T {
+    override fun foo() {
+        t.foo()
+    }
+}

idea/testData/refactoring/safeDelete/deleteFunction/kotlinFunctionWithJava/usageInOverrideToDelete.kt.after

@@ -0,0 +1,5 @@
+interface T {
+}
+
+class A(val t: T) : T {
+}